Which of the following application, 3-phase slip-ring induction motors are normally used? O Cranes O Lathes O Drilling machines O Agricultural pumps
Q: Describe how to adjust, the load sharing of two generators running in parallel.
A: Consider that the two generators have the same speed-torque characteristics and have the same load…
Q: When we use this type of single phase induction motors
A: When we use this type of single phase induction motors?
Q: Adding auxiliary winding in single phase induction motors.
A: As per Bartleby guidelines we are allowed to solve only one question, please ask the rest again.
Q: If the no-load speed of a squirrel cage induction motor connected to a three-phase, 50 Hz is 12.…
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Q: A delta connected 1185 V, 50 Hz three phase induction motor has a star-connected slip-ring rotor…
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Q: A 3-phase, 50 Hz induction motor has 8 poles. If the full load slip is 2.5 per cent, determine (a)…
A: Given: 3-phase induction motor having Frequency, f=50 Hz Number of poles, P=8 Slip, s=2.5%=0.025
Q: We use stroboscope to calculate the torque of three- phase induction motor?* True False
A: Scroboscope is used to measure the speed of induction motor.
Q: 3. Describe the Volts per Hertz Control for three phase induction motor.
A: The name volts per hertz control is self explanatory i.e. it clearly states that the ratio of…
Q: A delta connected 1235 V, 50 Hz three phase induction motor has a star-connected slip-ring rotor…
A: “Since you have posted a question with multiple sub-parts, we will solve the first three subparts…
Q: At standstill, the impedances of the inner and outer cages of an induction motor are Z, = 0.02 + j2…
A: The impedance of the inner cage at the slip s is given as, Zi=0.02+j2 ΩZI=0.02s2+22 The impedance…
Q: Q11. If the rotating speed of a synchronous motor becomes higher, will the slot leakage reactance…
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Q: 380 V, 50 Hz, 2p = 6, star connected induction motor impedance in ohms per phase values: R1 = 0.3,…
A: First we will calculate phase impedance seen by the stator and than we will calculate input current…
Q: A three-phase A-connected synchronous generator is rated at 130 MVA, 12.8 kV, 0.9 PF lagging, and 50…
A: a) TorqueTshaft=PinputFull loadωsTshaft=S×cosϕ4πfPTshaft=130M×0.94π×504Tshaft=0.745N-m b) Load…
Q: A 3-phase asynchronous motor with a phase equivalent circuit like the figure, at what slip value is…
A: The given equivalent circuit of asynchronous motor is
Q: A three-phase induction motor is used to drive many types of loads for example water pump and…
A:
Q: Analyse the reason behind the positive and negative torques produced by three phase synchronous…
A: In a three-phase synchronous motor. The stator is supplied with the three-phase ac while the rotor…
Q: Under short circuit, the reactance's of the synchronous generator during the steady state condition…
A: Given : Under short circuit, the reactance of the synchronous generator during steady state…
Q: Then, Determine the appropriate starting method for single phase and three phase induction motors.…
A: Starting methods of single phase and three phase Induction motor
Q: Identify three phase Synchronous motors and Three phase Induction motors which are used in…
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Q: A 4-pole induction motor and a 6-pole induction motor are connected in cumulative cascade. The…
A: We have been given two motors that are connected in cumulative cascade. one motor is 4 pole…
Q: Q3: Fill in the blanks with an appropriate word, when loading a three-phase induction motor, which…
A: "Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…
Q: 1-transfer function of DC Series motors (step by step) 2-block diagram of DC Series motors.
A: 63
Q: Part 1:- SYNCHRONOUS GENERATOR 1. List the types of synchronous generators. 2. Explain the working…
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Q: The power factor of three- phase induction motor is decreased with decreasing in loading? * True…
A: True The statement that the power factor of three phase Induction motor is decreased by decreasing…
Q: Draw and explain a complete equivalent circuit of single phase induction motor
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Q: Assume a three phase induction motor is connected to a three phase system and the shaft is coupled…
A: Three-Phase induction motor is a device which is used to convert 3-phase electric input power into…
Q: 1. In a single-phase induction motor with a starting capacitor, find the reactance value Xc of the…
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Q: Rotor leakage impedance at starting is different from its value at normal running conditions. a)…
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Q: the single phase induction motor can not be rotate without auxiliary winding * I true ) false
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Q: A 4 pole wave wound shunt generator delivers 205A at a terminal voltage of 240V. Ra and Rsh are…
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Q: ndard practice of synchronous generator construction now a days is to ndrical field ating armature…
A: These are the few questions related to the basic understanding of alternators their construction and…
Q: ii) Assume a three phase induction motor is connected to a three phase system and the shaft is…
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Q: Calculate the frequency of rotor current for six pole, 3-phase induction motor running at 950 r.p.m…
A: The detailed solution is provided below.
Q: QII. Permanent-split capacitor motor is in effect a 2-phase motor and at no load could attain the…
A: PERMANENT SPLIT CAPACITOR MOTOR:- also known as Single valued Capacitor motor.this type of motor…
Q: A 50-MVA, 30-kV, three-phase synchronous generator has a synchronous reactance of 8 Ohms/phase and…
A: According to the question we need to calculate the value of excitation per phase and power angle.
Q: Which of the following application, 3-phase squirrel cage induction motors are normally used? O…
A: There are two types of induction motors based on their construction: Squirrel cage and slip ring…
Q: Which of the following phase sequence of harmonics causes torque pulsing (parasitic torque),…
A: Choose the correct option Which of the following phase sequence of harmonics causes torque…
Q: Three phase asynchronous motor requires three phase AC power supply for Stator winding and DC power…
A: Given that Three phase asynchronous motor requires three phase AC power supply for Stator winding…
Q: Which of the statement is true about 3- phase induction motor (IM) ? Ns: Synchronous speed
A: We are authorized to answer one question at a time, since you have not mentioned which question you…
Q: A long-shunt d.c. compound generator supplies 100A at 190V. The resistance of armature, series field…
A: Given: I =100 V=190v Ra= 0.02 Rse=0.06 Rsh=85
Q: In differential compound DC Generator the shunt field current and the series field current are in…
A: Q.1 In differential compound shunt and series flux are opposite to each other As, Hence given…
Q: Below are the single-phase equivalent circuit parameters of a 3-phase Star connected asynchronous…
A: The data given in the question are as follows: 4KW, VL=380V, VPH=220V, f=50Hz, P=4, r1=1.5Ω,…
Q: Under short circuit, the reactance's of the synchronous generator during the steady state condition…
A: direct axis reactance is calculated by Xd=X1+Xad X1= 0.15 ohm Xad= 0.168 ohm
Q: Identify statement below if its true or false. Statement I. An induction motor can be treated as a…
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Q: A 3-phase star connected, 6 pole synchronous machine has 36 slots. Show the distribution of winding…
A: Given: For a 3-phase star-connected synchronous machine, Number of phases m=3, Number of poles P=6,…
Q: A delta connected 1185 V, 50 Hz three phase induction motor has a star-connected slip-ring rotor…
A:
Q: In your own idea using various types of single-phase induction motors, give 2 impacts to the…
A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for…
Q: 2. A: Large synchronous machines are constructed with armature winding on stator. * R: Stationary…
A: 2. in large machines, armature winding is mounted on the stator, because it cools more efficiently,…
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- Which of the following application, 3-phase squirrel cage induction motors are normally used? O Cranes Conveyers O Agricultural Pumps O LiftsA) Although the magnetic field for each phase of a 3-phase induction motor is merely switching back and forth between north and south poles, the resultant magnetic influence from all phases sets up a rotating magnetic field to cut the rotor conductors. a) true b) false B) In a two-pole stator winding of a 3-phase motor, how many revolutions does the rotating tr) magnetic field make in one cycle of the electrical current? a) one b) 60 c) 3600 d) none of the aboveA four-pole, wave-wound generator has 220 coils of 10 turns each. The resistance of each turn is 0.02 2. Find the resistance of the armature winding.
- 4- An induction Motor is a) Self-starting with high torque c) Self-starting with low torque 5- In three-phase squirrel-cage induction motors a) Rotor conductors are kept open b) Rotor conductor ends are short-circuited through slip rings c) Rotor conductors are short-circuited through end rings d) Rotor conductors are connected to insulation b) Self-starting with zero torque d) Not self-startingWhen slip of a three phase induction machine becomes negative, it will be functioning as a motor. Select one: True FalseA) Although the magnetic field for each phase of a 3-phase induction motor is merely switching back and forth between north and south poles, the resultant magnetic influence from all phases sets up a rotating magnetic field to cut the rotor conductors. a) true b) false B) In a two-pole stator winding of a 3-phase motor, how many revolutions does the rotating magnetic field make in one cycle of the electrical current? a) one b) 60 c) 3600 d) none of the above 3.
- A dc generator is run at 500 rpm. The eddy current losses and hysteresis losses are found to be 100 and 200 W, respectively. At what speed will it be run to reduce the core losses by 20%?The DC shunt generator with the terminal voltage 375 V, armature drop 9 V and the each brush drop 2 V, then the value of generated emf is In a DC machine, armature shaft is generally supported at the both ends by Bearings O Yoke Brushes CommutatorT-a. The direction of rotation of a single-phase split-phase motor can be change by........ a) reversing the connection of the start winding b) reversing the connection of the run winding c) reversing the connection of the start and run winding at the same time d) "a" or "b", not "c" T-b. Single-phase split-phase motors using an electrolytic capacitor in the start winding circuit should not be cycled more than about__________ time per hour. a) 8 b) 12 c) 24 d) none of the above T-c. When replacing the capacitor in a capacitor-start induction-run motor, one must be sure to replace the bad capacitor with__________ . a) a smaller one b) one of the same size c) a larger one d) none of the above
- A 100kW generator, 250V, 6 poles have a wave wound armature with 300 turns then the number of compensating winding turns per pole is if the ratio of pole arc/pole pitch is 0.72 bii 13 .approximately equal to ---- none of the mentioned. 18 8 50 O 16 O 36We use stroboscope to calculate the torque of three- phase induction motor?* True O False7- Iron loss in the rotor of a 3-phase induction motor is negligible due to (a) Very low frequency of emf induced in the rotor (c) Very low flux density in rotor parts 8- The starting current of a 3-phase induction motor is about (a) Half (c) 5 to 7 times (b) Twice (d) 8 to 10 times 9- During plugging of an induction motor (a) Phase sequence is reversed (b) A de source is connected to stator (e) One phase is open circaited (d) Power is ied back to mains 10- Direct online (D.O.L.) starter is used for induction motors (a)Less than 5 h.p. (b) Less than 10 h.p. (c) Greater than 10 h.p. (d) For any capacity (b) Very low emf induced in the rotor (d) Constant magnitude of flux linking the rotor core of its full load rated current